Tebow triumphant in return to Florida | Photo Gallery

MIAMI — For 54 minutes Sunday, the thousands of University of Florida backers who flocked to Sun Life Stadium to bear witness to quarterback Tim Tebow's first start of the season for the Denver Broncos had little reason to cheer.

He struggled to read pass coverages. His throws were off-target. His team couldn't score.

Then, seemingly out of nowhere, Tebow rediscovered the magic that helped him win two national championships and a Heisman Trophy for the Gators.

Tebow, who had completed only 4 of 14 passes for 40 yards to that point, sandwiched two touchdown tosses around a successful onside kick to erase a 15-0 deficit and force overtime, where Matt Prater kicked a 52-yard field goal that gave the Broncos an improbable, 18-15 victory over the still-winless Miami Dolphins.